Costa Del Your Maw- rather than the usual scottish slang insulting remark of "yer maw" , a modern day cultured version of the phrase is used by inserting "costa del" at the start. Normally the phrase is used by hispanic teenagers in Scottish modern studies classes .
Girl: yo kelly bhoy!
Girl2: shut it ya chuggington
girl 1: Aw no she didn't ... go Costa Del Your Maw!